<template>
  <Header></Header>
  <div class='coursemain'>
    <div class="course-main">
      <section class="search-container">
        <div class="search-item">
          <div class="title-name">课程方向：</div>
          <div class="all-items">
            <el-tag
                class="category-poniter"
                effect="plain"
                type="info"
                @click="allCourse"
            >全部
            </el-tag>
            <el-tag
                v-for='item in firstCategorys'
                :key='item.id'
                :class="currentType['fcategory'].id===item.id?'category-poniter':'category-poniter-item'"
                effect="plain"
                type="info"
                @click='buildingCondition("fcategory",item.id)'
            >
              {{ item.categoryName }}
            </el-tag>
          </div>
        </div>
        <div class="search-item search-item-transition" style="top: 45px;">
          <div class="title-name">课程分类：</div>
          <div class="all-items">
            <el-tag
                class="category-poniter"
                effect="plain"
                type="info"
            >全部
            </el-tag>
            <el-tag
                v-for='item in secondCategorys'
                :key='item.id'
                :class="currentType['scategory'].id===item.id?'category-poniter':'category-poniter-item'"
                effect="plain"
                type="info"
                @click='buildingCondition("scategory",item.id)'
            > {{ item.categoryName }}
            </el-tag>
          </div>
        </div>
        <div class="search-item" style="top: 90px;">
          <div class="title-name">课程难度：</div>
          <div class="all-items">
            <el-tag
                class="category-poniter"
                effect="plain"
                type="info"

            >全部
            </el-tag>
            <el-tag
                v-for='item in courseLevel'
                :key='item.code'
                :class="currentType['clevel'].id===item.code?'category-poniter':'category-poniter-item'"
                effect="plain"
                type="info"
                @click='buildingCondition("clevel",item.code)'
            > {{ item.text }}
            </el-tag>
          </div>
        </div>
      </section>
    </div>
    <div class='main-container'>
      <div class="container-top">
        <ul class="all">
          <li class="item"
              @click="handleZonghe"
              :style='priceSortBy==="1" ? "color:#2C80FF":""'
          >
            综合
          </li>
          <li class="item split">|</li>
          <li class="item"
              @click="handleNewCourse"
              :style='priceSortBy==="2" ? "color:#2C80FF":""'
          >
            最新课程
          </li>
          <li class="item split">|</li>
          <li class="item"
              @click="mostbuy"
              :style='priceSortBy==="3" ? "color:#2C80FF":""'
          >
            最多购买
          </li>
          <li class="item split">|</li>
          <li class="item-price"
              @click="handlePrice"
          >
            <span :style='priceSortBy==="4"|| priceSortBy==="5"? "color:#2C80FF":""'>价格</span>
            <span class="arrow">
              <el-icon :style='priceSortBy==="4" ? "color:#2C80FF":""'><caret-top /></el-icon>
              <el-icon :style='priceSortBy==="5" ? "color:#2C80FF":""'><caret-bottom /></el-icon>
            </span>
          </li>
        </ul>
        <ul class="right">
          <li class="right-item">
            <el-radio-group v-model="radio">
              <el-radio label="1">免费课程</el-radio>
              <el-radio label="2">会员课程</el-radio>
            </el-radio-group>
          </li>
        </ul>
      </div>
      <div class="container-body">
        <div class="newCourseContent">
          <ul class="courseUl">
            <li
                class='courseItem'
                v-for='item in courseList'
                :key='item.id'
            >
              <router-link :to="{ path: '/course-info/' + item.id }">
                <div class='courseInfo'>
                <div class='courseBg'>
                  <img :src="item.courseCover" alt="">
                </div>
                <div class="courseName">{{ item.courseName }}</div>
                <div class="courseDegree">{{ courseTypeFn(item.courseLevel) }} ·
                  {{ item.purchaseCounter + item.purchaseCnt }}人报名
                </div>

                <div class="coursePriceZero" v-if="item.discountPrice == 0">
                  <div class="pricefree">免费学习</div>
                  <img src="../assets/img/free.png" alt="">
                </div>

                <div class="coursePrice" v-else-if="item.isMember == 1">
                  <div class="courseMemberbg"><span class="courseMember">会员免费</span></div>
                  <div class="price">¥ {{ item.discountPrice }}</div>
                </div>

                <div class="coursePricePri" v-else>
                  <div class="pricePri">¥ {{ item.discountPrice }}</div>
                </div>
              </div>
              </router-link>
            </li>
          </ul>
        </div>
        <div class='pages'>
          <el-pagination
              background
              layout="prev, pager, next"
              :total="total"
              @current-change='handleCurrentChange'
          />
        </div>
      </div>
    </div>
  </div>
  <Foot></Foot>
</template>


<script setup>
// 课程图标
import { CaretTop , CaretBottom } from "@element-plus/icons-vue";
//mixin
import mixin from '../mixins/courseType.js'

let {courseTypeFn} = mixin();
//组件
import Header from '../components/common/Header.vue'
import Foot from '../components/common/Foot.vue'
//api
import {getFirstCategorys, getSecondCategorys, searchCourse} from '../utils/api/courseManage'
//获取一级分类的数据
let firstCategorys = ref([]);
//获取二级分类的数据
let secondCategorys = ref([]);
let category = reactive({
  categoryId: -1
})

//请求二级分类
const getSecondCategorysFn = (category) => {
  getSecondCategorys(category).then(res => {
    secondCategorys.value = res.data.list;
  })
}

//课程难度的数据
let courseLevel = ref([
  {text: '初级', code: '1'},
  {text: '中级', code: '2'},
  {text: '高级', code: '3'}
]);
//查询课程的数据
let courseList = ref([]);
//课程的总数量
let total = ref(0);
let queryCoursePrams = reactive({
  pageNum: 1,
  pageSize: 8,
  entity: {
    firstCategory: '',
    secondCategory: '',
    courseLevel: '',
    isMember: '',
    isFree: '',
    sortBy: ''
  }
})
const querySearchCourse = () => {
  searchCourse(queryCoursePrams).then(res => {
    courseList.value = res.data.pageInfo.list;
    total.value = res.data.pageInfo.total;
  })
}
//生命周期
onBeforeMount(() => {
  //请求一级分类
  getFirstCategorys().then(res => {
    firstCategorys.value = res.data.list;
  })
  //请求二级分类
  getSecondCategorysFn(category);
  //查询所有课程
  querySearchCourse();
})

//分页
const handleCurrentChange = (val) => {
  //页面的赋值
  queryCoursePrams.pageNum = val;
  //查询对应页的数据
  querySearchCourse();
}
//点击课程方向、分类、难度 对应切换class
let currentType = reactive({
  fcategory: {id: ''},
  scategory: {id: ''},
  clevel: {id: ''}
})

//点击分类
const buildingCondition = (type, id) => {

  if (type === 'fcategory') {
    currentType['scategory'].id = '';
    currentType['clevel'].id = '';
    currentType[type].id = id;
    queryCoursePrams.entity.courseLevel = '';
    queryCoursePrams.entity.secondCategory = '';
    queryCoursePrams.entity.firstCategory = id;
    category.categoryId = id;
    getSecondCategorysFn(category);
    querySearchCourse();
    return;
  }
  if (type === 'scategory') {
    currentType['clevel'].id = '';
    currentType[type].id = id;
    queryCoursePrams.entity.courseLevel = '';
    queryCoursePrams.entity.secondCategory = id;
    querySearchCourse();
    return;
  }
  if (type === 'clevel') {
    currentType[type].id = id;
    queryCoursePrams.entity.courseLevel = id;
    //查询所有课程
    querySearchCourse();
    return
  }
}

// radio免费与会员课程
let radio = ref(0)
watch(radio, (newVal, oldVal) => {
  if (newVal === "1") {
    queryCoursePrams.entity.isMember = '';
    queryCoursePrams.entity.isFree = "1"
  } else if (newVal === "2") {
    queryCoursePrams.entity.isMember = '1';
    queryCoursePrams.entity.isFree = ""
  }
  querySearchCourse()
})
// 全部
const allCourse = () => {
  searchCourse({
    pageNum:1,
    pageSize: 11
  }).then(res => {
    currentType['scategory'].id = '';
    currentType['clevel'].id = '';
    currentType['fcategory'].id = "";
    queryCoursePrams.entity.courseLevel = '';
    queryCoursePrams.entity.secondCategory = '';
    queryCoursePrams.entity.firstCategory = '';
    // console.log(res.data.pageInfo.list)
    courseList.value = res.data.pageInfo.list
  })
}
//控制价格 升降序
let priceSortBy = ref('1');
//综合
const handleZonghe = ()=>{
  priceSortBy.value = '1'
  queryCoursePrams.entity.sortBy = '';
  querySearchCourse();
}
// 最新课程
const handleNewCourse = () => {
  priceSortBy.value = '2'
  queryCoursePrams.entity.sortBy = 'time-desc';
  querySearchCourse();
}
//最多购买
const mostbuy = ()=>{
  priceSortBy.value = '3'
  queryCoursePrams.entity.sortBy = 'purchase-desc';
  querySearchCourse();
}
//价格
const handlePrice = ()=>{
  if( priceSortBy.value === '4' ||  priceSortBy.value !== '5' ){
    priceSortBy.value = '5'
    queryCoursePrams.entity.sortBy = 'price-desc';
  }else if( priceSortBy.value === '5'){
    priceSortBy.value = '4'
    queryCoursePrams.entity.sortBy = 'price-asc';
  }
  querySearchCourse();
}
let router = useRouter();

</script>

<style scoped>
.course-main {
  padding: 20px 0;
  width: 100%;
  height: 130px;
  background: #f3f5f9;
}
.search-container{
  width: 1200px;
  margin: 0 auto;
  position: relative;
  height: 100%;
}
.search-item{
  display: flex;
  overflow: hidden;
  cursor: pointer;
  position: absolute;
  height: 45px;
  transition: all 0.5s;
}
.search-item-transition:hover{
  z-index: 777;
  height: auto;
  box-shadow: rgb(95 101 105 / 10%) 0px 12px 20px 0px;
  border-radius: 8px;
  background: rgba(255,255,255);
}
.search-item .title-name {
  width: 100px;
  font-size: 16px;
  font-family: Microsoft YaHei;
  font-weight: bold;
  line-height: 25px;
  text-align: justify;
  color: #333333;
  padding: 10px;
  opacity: 1;
}
.search-item .title-name:after {
  content: '.';
  width: 100%;
  display: inline-block;
  overflow: hidden;
  height: 0;
}

.search-item .all-items{
  width: calc(100% - 120px);
  min-height: 25px;
  display: flex;
  flex-wrap: wrap;
}
.title .all-list {
  width: 40px;
  height: 25px;
  line-height: 25px;
  border-radius: 4px;
  padding: 0 10px;
  align-items: center;
  text-align: center;
}

.title .all {
  opacity: 1;
  color: #2c80ff;
}

.title .item {
  height: 25px;
  line-height: 25px;
  margin: 0 15px;
  font-size: 16px;
  font-family: Microsoft YaHei;
  font-weight: 400;
  line-height: 21px;
  opacity: 1;
}

.title .item .active {
  color: #2c80ff;
}

.category-poniter {
  height: 25px;
  line-height: 25px;
  margin: 10px 5px;
  cursor: pointer;
  border: none;
  background: rgba(44, 128, 255, 0.1);
  color: #2c80ff;
}
.category-poniter-item {
  height: 25px;
  line-height: 25px;
  margin: 10px 5px;
  cursor: pointer;
  border: none;
  background: none;
  color: rgba(81, 87, 89, 1);
}

.main-container {
  width: 1200px;
  margin: 0 auto;
}

.container-top {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-top: 12px;
}

.all {
  display: flex;
  padding-top: 20px;
  font-size: 16px;
  color: #515759;
}

.all .item:first-child {
  margin-right: 20px;
}

.all .item {
  margin: 0 10px;
  cursor: pointer;
}

.right {
  display: flex;
  padding-top: 20px;
  font-size: 16px;
  color: #515759;
}

.right .right-item {
  margin-left: 10px;
}

.right .right-items {
  margin-right: 0px;
}

.arrow {
  position: relative;
}

.arrow i:first-child {
  position: absolute;
  top: -1px;
}

.arrow i:last-child {
  position: absolute;
  top: 7px;
}

.check {
  width: 15px;
  height: 15px;
  cursor: pointer;
}

.up {
  position: absolute;
  top: 5px;
  left: 2px;
}

.down {
  position: absolute;
  top: 15px;
  left: 2px;
  transform: rotate(180deg);
  -ms-transform: rotate(180deg); /* IE 9 */
  -moz-transform: rotate(180deg); /* Firefox */
  -webkit-transform: rotate(180deg); /* Safari 和 Chrome */
  -o-transform: rotate(180deg); /* Opera */
}
.newCourseContent {
  width: 1200px;
  margin: 30px auto 0px auto;
}

.newCourseContent .courseUl {
  display: flex;
  flex-wrap: wrap;
}
.courseItem{
  width: 285px;
  height: 280px;
  margin: 0 20px 20px 0;
  transition: margin-top 0.2s;
}
.courseItem a{
  text-decoration: none;
}
.courseItem:hover{
  margin-top: -10px;
  cursor: pointer;
}
.courseItem:nth-child(4n+0){
  margin-right: 0 !important;
}
.courseInfo{
  position: relative;
  width: 100%;
  height: 270px;
  background: #ffffff;
  box-shadow: 1px 1px 10px rgb(27 39 94 / 40%);
  opacity: 1;
  border-bottom-left-radius: 6px;
  border-bottom-right-radius: 6px;
  overflow: hidden;
  text-decoration: none;
}
.courseBg{
  position: relative;
  width: 100%;
  height: 160px;
}
.courseBg img{
  width: 100%;
  height: 100%;
}
.courseName{
  margin: 10px;
  font-weight: bold;
  font-size: 14px;
  color: #333333;
  display: -webkit-box;
  overflow: hidden;
}
.courseDegree{
  margin-left: 10px;
  font-size: 12px;
  color: #808080;
}
.coursePrice {
  display: flex;
  justify-content: space-around;
  align-items: center;
  width: 130px;
  font-size: 14px;
  margin-top: 15px;
  padding: 0 5px;
}
.coursePricePri{
  width: 75px;
  font-size: 14px;
  margin-top: 18px;
  padding: 0 13px;
  color: rgba(255, 114, 127, 1);
  font-weight: 700;
}
.coursePriceZero{
  display: flex;
  justify-content: space-between;
  align-items: center;
  width: 75px;
  font-size: 14px;
  margin-top: 15px;
  padding: 0 10px;
  color: rgba(53, 134, 255, 1);
}
.courseMemberbg {
  position: relative;
  width: 80px;
  height: 20px;
  color: #ffffff;
  background: linear-gradient(90deg, #ff928e 0%, #fe7062 99%);
  border-radius: 24px 0px 24px 0px;
}
.courseMember {
  position: absolute;
  line-height: 20px;
  left: 13px;
  font-weight: 700;
}
.price {
  line-height: 25px;
  left: 100px;
  color: #ff727f;
  font-weight: 700;
}
.pages{
  display: flex;
  align-items: center;
  justify-content: center;
  padding:20px 0;
}
</style>
